<!doctype html>

<title>02 JSX - React From Zero</title>

<script src="https://unpkg.com/react@16.4.0/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.4.0/umd/react-dom.development.js"></script>

<script src="https://unpkg.com/@babel/standalone/babel.min.js">
// Now we will use JSX, which needs to be converted to JavaScript.
// For this we will use Babel. Babel is normally used to convert
// ES2015 to ES5, but it also can convert JSX to ES5. Babels browser
// version uses text/babel script tags.
</script>

<div id="app"></div>

<script type="text/babel">
// JSX is the idiomatic way of creating elements.
// It's basically XHTML with {} for dynamic content
// also class has to be called className
var reactElement = (
  <h1
    className="abc"
    style={{ textAlign: "center" }}
    onClick={function() {
      alert("click");
    }}
  >
    Hello, world!
  </h1>
);

// Is the same as
reactElement = React.createElement(
  "h1",
  {
    className: "abc",
    style: { textAlign: "center" },
    onClick: function() {
      alert("click");
    }
  },
  "Hello, world!"
);

// JSX shines with simple elements that make up the majority
var anotherElement = <p>A nice text paragraph.</p>;
// Is the same as
anotherElement = React.createElement(
  "p",
  null,
  "A nice text paragraph."
);

// As we can see, everything else works as before
var renderTarget = document.getElementById("app");

ReactDOM.render(reactElement, renderTarget);
</script>